2009A&A...500L..13D

Query : 2009A&A...500L..13D

2009A&A...500L..13D - Astronomy and Astrophysics, volume 500L13-16 (2009/6-3)

Double or binary: on the multiplicity of open star clusters.

DE LA FUENTE MARCOS R. and DE LA FUENTE MARCOS C.

Abstract (from CDS):

Observations indicate that the fraction of potential binary star clusters in the Magellanic Clouds is about 10%. In contrast, it is widely accepted that the binary cluster frequency in the Galaxy disk is much lower. Here we investigate the multiplicity of clusters in the Milky Way disk to either confirm or disprove this dearth of binaries. We quantify the open cluster multiplicity using complete, volume-limited samples from WEBDA and NCOVOCC. At the Solar Circle, at least 12% of all open clusters appear to be experiencing some type of interaction with another cluster; i.e., are possible binaries. As in the Magellanic Clouds, the pair separation histogram hints at a bimodal distribution. Nearly 40% of identified pairs are probably primordial. Most of the remaining pairs could be undergoing some type of close encounter, perhaps as a result of orbital resonances. Confirming early theoretical predictions, the characteristic time scale for destruction of bound pairs in the disk is 200Myr, or one galactic orbit. Our results show that the fraction of possible binary clusters in the Galactic disk is comparable to that in the Magellanic Clouds.

Abstract Copyright: ∼

Journal keyword(s): methods: statistical - Galaxy: open clusters and associations: general - stars: formation - Galaxy: disk - evolution - Galaxy: solar neighborhood

Simbad objects: 86

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Number of rows : 86
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 189 OpC 00 39 24.9 +61 05 56   9.07 8.8     ~ 49 0
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
3 [KPR2005] 4 OpC 00 53 10 +61 34.8           ~ 20 0
4 NGC 659 OpC 01 44 24.2 +60 40 35   8.40 7.9     ~ 96 0
5 NGC 663 OpC 01 46 22.2 +61 12 53   7.78 7.1     ~ 269 0
6 [KPR2005] 6 OpC 01 47 22.1 +57 43 56           ~ 36 0
7 Cl Stock 4 OpC 01 52 07.4 +57 02 45           ~ 35 0
8 NGC 869 OpC 02 18 57.0 +57 08 02           ~ 504 0
9 NGC 884 OpC 02 22 15.7 +57 08 59           ~ 503 0
10 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
11 [BCG93] 1 TT* 04 14 17.6095515480 +28 06 09.654704388 18.04         M4.5 126 0
12 NGC 1746 err 05 03 50 +23 46.2           ~ 40 0
13 NGC 1758 OpC 05 04 42.8 +23 48 43           ~ 61 0
14 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
15 NAME 25 Ori Group OpC 05 24 50.9 +01 41 38           ~ 195 1
16 [KPR2005] 18 OpC 05 26 10 +00 49.2           ~ 36 0
17 [KPR2005] 21 OpC 05 28 26.6 +03 33 00           ~ 75 0
18 [KPR2005] 20 OpC 05 28 44 +01 37.8           ~ 51 0
19 M 42 HII 05 35 16.8 -05 23 15           ~ 4411 0
20 NGC 1981 OpC 05 35 24.4 -04 29 58     4.2     ~ 99 0
21 Cl Collinder 70 OpC 05 35 30 -01 06.0           ~ 65 0
22 NAME sig Ori Cluster OpC 05 38 42 -02 36.0           ~ 623 0
23 Cl Basel 8 OpC 06 33 56.1 +08 03 06           ~ 40 0
24 NGC 2251 OpC 06 34 44.8 +08 21 15   7.69 7.3     ~ 123 0
25 NGC 2302 OpC 06 51 56.7 -07 05 13           ~ 62 0
26 NGC 2306 OpC 06 54 25 -07 12.3           ~ 20 0
27 [KPR2005] 34 OpC 07 10.5 +06 04           ~ 14 0
28 NGC 2421 OpC 07 36 12.1 -20 37 33   8.69 8.3     ~ 64 0
29 ESO 560-3 OpC 07 36 55.4 -20 31 27           ~ 31 0
30 NGC 2428 OpC 07 39 21.0 -16 33 54           ~ 42 0
31 Cl Ruprecht 151 OpC 07 41 09.6 -16 17 54           ~ 42 0
32 NGC 2448 OpC 07 44 21.4 -24 53 39           ~ 47 1
33 NGC 2447 OpC 07 44 34.6 -23 51 22           ~ 170 1
34 Cl Mamajek 1 OpC 08 42 32.9 -78 57 47           ~ 392 0
35 ESO 313-13 OpC 08 44 51.8 -41 17 02   7.01 6.7     ~ 95 0
36 Cl Alessi 43 OpC 08 50 27.4 -41 44 30           ~ 56 0
37 Cl VDBH 91 OpC 10 17.3 -58 42           ~ 21 0
38 [KPR2005] 59 OpC 10 20.2 -57 39           ~ 18 0
39 NGC 3228 OpC 10 21 34.1 -51 45 39           ~ 98 0
40 Cl Loden 46 OpC 10 23 40.2 -54 40 48           ~ 35 0
41 C 1026-579 OpC 10 28.4 -58 08           ~ 20 0
42 NGC 3293 OpC 10 35 50.3 -58 14 04           ~ 327 0
43 C 1035-584 OpC 10 36 05 -58 43.5           ~ 21 0
44 NAME Carraro 1 OpC 10 36 56 -58 45.0           ~ 13 0
45 NGC 3324 OpC 10 37 20.8 -58 37 26           ~ 145 1
46 Cl Ruprecht 91 OpC 10 47 45.3 -57 29 41           ~ 51 0
47 ESO 128-16 OpC 10 53.7 -58 14           ~ 15 0
48 Z 268-17 G 11 18 17.069 +53 44 59.51   15.2       ~ 46 0
49 [KPR2005] 68 OpC 11 59 54.6 -60 39 59           ~ 38 0
50 Cl Loden 565 OpC 12 08 19 -60 39.0           ~ 26 0
51 ESO 132-14 OpC 13 36 30.0 -62 12 49           ~ 12 0
52 NGC 5281 OpC 13 46 25.8 -62 55 00   6.15 5.9     ~ 92 0
53 C 1356-581 OpC 13 59 39 -58 20.0           ~ 20 0
54 Cl Loden 1194 OpC 14 08 16.1 -59 46 40           ~ 40 0
55 NGC 5617 OpC 14 29 46.5 -60 43 02           ~ 108 0
56 Cl Pismis 19 OpC 14 30 40.0 -60 53 21           ~ 41 0
57 Cl Trumpler 22 OpC 14 31 09.5 -61 10 33           ~ 67 0
58 Cl Alessi 8 OpC 15 29 54.2 -51 13 22           ~ 41 0
59 Cl Johansson 1 OpC 15 46 15 -52 22.7           ~ 12 0
60 NGC 6204 OpC 16 46 09.1 -47 01 29   8.51 8.2     ~ 139 0
61 Cl Hogg 22 OpC 16 46 34.1 -47 06 12           ~ 81 0
62 Cl Lynga 14 OpC 16 55 03 -45 14.3           ~ 44 0
63 NGC 6242 OpC 16 55 31.8 -39 28 09           ~ 98 0
64 Cl Trumpler 24 OpC 16 57 00 -40 40.0     8.6     ~ 74 0
65 NGC 6250 OpC 16 57 55.2 -45 56 48   6.14 5.9     ~ 89 0
66 [KPR2005] 90 OpC 17 38 55.7 -34 47 06           ~ 32 0
67 NGC 6405 OpC 17 40 14.5 -32 14 16           ~ 235 0
68 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
69 NGC 6425 OpC 17 46 55.2 -31 29 57   7.90 7.2     ~ 75 0
70 Cl Basel 5 err 17 52.4 -30 06           ~ 29 0
71 NGC 6469 OpC 17 53 04.2 -22 17 51     8.2     ~ 34 0
72 Cl Ruprecht 139 OpC 18 01.0 -23 32           ~ 20 0
73 Cl Bochum 14 OpC 18 02 00 -23 42.3   10.72 9.3     ~ 39 0
74 Cl Collinder 469 OpC 18 16 34.9 -18 18 34   9.61 9.1     ~ 44 0
75 M 18 OpC 18 19 56.2 -17 04 21           ~ 93 0
76 NGC 6618 OpC 18 20 47 -16 10.3           ~ 1700 0
77 [KPR2005] 100 OpC 19 01 37 +33 34.2           ~ 27 0
78 [KPR2005] 101 OpC 19 13 29.5 +36 19 29           ~ 48 0
79 NGC 6871 OpC 20 06 07.9 +35 46 45   5.43 5.2     ~ 237 0
80 Cl Biurakan 1 OpC 20 07 30 +35 41.0           ~ 29 0
81 Cl Biurakan 2 OpC 20 09 12.4 +35 29 23           ~ 61 0
82 Cl Ruprecht 172 OpC 20 11 32.5 +35 35 53           ~ 33 0
83 Cl Bica 1 OpC 20 33 10 +41 13.1           ~ 12 0
84 Cl Bica 2 OpC 20 33 15 +41 18.7           ~ 22 0
85 NAME Galactic Bar reg ~ ~           ~ 1458 0
86 NAME Gould Belt PoG ~ ~           ~ 956 1

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